Examples
In this section you can see examples of how the programme works.
Correct programmes
Assignment
Query:
x = 4; y = 5;
Output:
out.S
jal x1, MAIN
x:
data 0 * 1
y:
data 0 * 1
MAIN:
li x1, 4
sw x0, 1, x1
li x1, 5
sw x0, 2, x1
ebreak
Arithmetic and logical operations. Branching, including optional elif. Support for integer and logical data types. C-like multi-line comments.
Query:
x = 4;
y = false;
z = 0;
if (y) {
z = 1;
}
/* Some Comment
Multi-line
Should be ignored
*/
elif (x == 4) {
z = 2;
}
else {
z = 3;
}
Output:
out.S
jal x1, MAIN
x:
data 0 * 1
y:
data 0 * 1
z:
data 0 * 1
MAIN:
li x1, 4
sw x0, 1, x1
li x1, 0
sw x0, 2, x1
li x1, 0
sw x0, 3, x1
lw x2, x0, 2
beq x2, x0, ELSE0
li x1, 1
sw x0, 3, x1
jal x1, ENDIF0
ELSE0:
lw x2, x0, 1
li x3, 4
seq x2, x2, x3
beq x2, x0, ELSE1
li x1, 2
sw x0, 3, x1
jal x1, ENDIF1
ELSE1:
li x1, 3
sw x0, 3, x1
ENDIF1:
ENDIF0:
ebreak
tree
List
Assignment x
Constant 4
List
Assignment y
Constant 0
List
Assignment z
Constant 0
If
Symbol y
Assignment z
Constant 1
If
Comparison ==
Symbol x
Constant 4
Assignment z
Constant 2
Assignment z
Constant 3
For operator
Query:
x = 4;
y = 32;
for (i = 1; i < 5; i = i + 1) {
x = x * i;
y = y / 2;
}
Output:
out.S
jal x1, MAIN
i:
data 0 * 1
x:
data 0 * 1
y:
data 0 * 1
MAIN:
li x1, 4
sw x0, 2, x1
li x1, 32
sw x0, 3, x1
li x1, 1
sw x0, 1, x1
WHILE0:
lw x2, x0, 1
li x3, 5
slt x2, x2, x3
beq x2, x0, ENDWHILE0
lw x1, x0, 2
lw x2, x0, 1
mul x1, x1, x2
sw x0, 2, x1
lw x1, x0, 3
li x2, 2
div x1, x1, x2
sw x0, 3, x1
lw x1, x0, 1
li x2, 1
add x1, x1, x2
sw x0, 1, x1
jal x1, WHILE0
ENDWHILE0:
ebreak
tree
List
Assignment x
Constant 4
List
Assignment y
Constant 32
For
Assignment i
Constant 1
Comparison <
Symbol i
Constant 5
Assignment i
Operator +
Symbol i
Constant 1
List
Assignment x
Operator *
Symbol x
Symbol i
Assignment y
Operator /
Symbol y
Constant 2
While operator
Query:
x = 2;
while(x <= 10) {
if (x == 4) {
x = x + 2;
}
else {
x = x + 1;
}
}
Output:
out.S
jal x1, MAIN
x:
data 0 * 1
MAIN:
li x1, 2
sw x0, 1, x1
WHILE0:
lw x2, x0, 1
li x3, 10
seq x4, x2, x3
slt x5, x2, x3
or x2, x4, x5
beq x2, x0, ENDWHILE0
lw x2, x0, 1
li x3, 4
seq x2, x2, x3
beq x2, x0, ELSE0
lw x1, x0, 1
li x2, 2
add x1, x1, x2
sw x0, 1, x1
jal x1, ENDIF0
ELSE0:
lw x1, x0, 1
li x2, 1
add x1, x1, x2
sw x0, 1, x1
ENDIF0:
jal x1, WHILE0
ENDWHILE0:
ebreak
tree
List
Assignment x
Constant 2
While
Comparison <=
Symbol x
Constant 10
If
Comparison ==
Symbol x
Constant 4
Assignment x
Operator +
Symbol x
Constant 2
Assignment x
Operator +
Symbol x
Constant 1
Error handling
Last modified: 06 June 2024